package com.yupi.yupicturebackend.service.impl;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.ObjUtil;
import cn.hutool.json.JSONUtil;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.github.xiaoymin.knife4j.core.util.StrUtil;
import com.yupi.yupicturebackend.api.AliYunAiApi;
import com.yupi.yupicturebackend.api.aliyunai.model.CreateOutPaintingTaskRequest;
import com.yupi.yupicturebackend.api.aliyunai.model.CreateOutPaintingTaskResponse;
import com.yupi.yupicturebackend.exception.BusinessException;
import com.yupi.yupicturebackend.exception.ErrorCode;
import com.yupi.yupicturebackend.exception.ThrowUtils;
import com.yupi.yupicturebackend.manager.CosManager;
import com.yupi.yupicturebackend.manager.FileManager;
import com.yupi.yupicturebackend.manager.upload.FilePictureUpload;
import com.yupi.yupicturebackend.manager.upload.PictureUploadTemplate;
import com.yupi.yupicturebackend.manager.upload.UrlPictureUpload;
import com.yupi.yupicturebackend.model.dto.file.UploadPictureResult;
import com.yupi.yupicturebackend.model.dto.picture.*;
import com.yupi.yupicturebackend.model.entity.Picture;
import com.yupi.yupicturebackend.model.entity.Space;
import com.yupi.yupicturebackend.model.entity.User;
import com.yupi.yupicturebackend.model.enums.PictureReviewStatusEnum;
import com.yupi.yupicturebackend.model.vo.PictureVO;
import com.yupi.yupicturebackend.model.vo.UserVO;
import com.yupi.yupicturebackend.service.PictureService;
import com.yupi.yupicturebackend.mapper.PictureMapper;
import com.yupi.yupicturebackend.service.SpaceService;
import com.yupi.yupicturebackend.service.UserService;
import com.yupi.yupicturebackend.utils.ColorSimilarUtils;
import com.yupi.yupicturebackend.utils.ColorTransformUtils;
import lombok.extern.slf4j.Slf4j;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;
import org.springframework.transaction.support.TransactionTemplate;


import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import java.awt.*;
import java.io.IOException;
import java.util.*;
import java.util.List;
import java.util.stream.Collectors;

/**
* @author 23131
* @description 针对表【picture(图片)】的数据库操作Service实现
* @createDate 2025-04-26 14:39:18
*/
@Slf4j
@Service
public class PictureServiceImpl extends ServiceImpl<PictureMapper, Picture>
    implements PictureService{

    @Resource
    private FileManager fileManager;

    @Resource
    private UserService userService;

    @Resource
    private FilePictureUpload filePictureUpload;

    @Resource
    private UrlPictureUpload urlPictureUpload;

    @Resource
    private SpaceService spaceService;

    @Resource
    private TransactionTemplate transactionTemplate;;

    @Autowired
    private CosManager cosManager;

    @Resource
    private AliYunAiApi aliYunAiApi;

    /**
     * 上传图片
     * @param inputSource
     * @param pictureUploadRequest
     * @param loginUser
     * @return
     */
    @Override
    public PictureVO uploadPicture(Object inputSource, PictureUploadRequest pictureUploadRequest, User loginUser) {

        //校验参数
        ThrowUtils.throwIf(loginUser==null, ErrorCode.NO_AUTH_ERROR);
        //校验空间是否存在
        Long spaceId = pictureUploadRequest.getSpaceId();
        if(spaceId!=null){
            Space space = spaceService.getById(spaceId);
            ThrowUtils.throwIf(space==null, ErrorCode.NOT_FOUND_ERROR,"空间不存在");
            //校验是否有空间权限
            if(!loginUser.getId().equals(space.getUserId())){
                throw new BusinessException(ErrorCode.NO_AUTH_ERROR);
            }
            //额度校验
            if(space.getTotalCount() >= space.getMaxCount()){
                throw new BusinessException(ErrorCode.NO_AUTH_ERROR,"空间条数不足");
            }
            if(space.getTotalSize() >= space.getMaxSize()){
                throw new BusinessException(ErrorCode.NO_AUTH_ERROR,"空间内存不足");
            }
        }
        //判断是新增还是更新
        Long pictureId = null;
        if(pictureUploadRequest!=null){
            pictureId = pictureUploadRequest.getId();
        }
        //如果是更新 判断图片是否存在
        if(pictureId!=null){
            Picture oldPicture = this.getById(pictureId);
            ThrowUtils.throwIf(oldPicture == null, ErrorCode.NOT_FOUND_ERROR,"图片不存在");
            //仅本人或者管理员可修改
            if(!oldPicture.getUserId().equals(loginUser.getId()) && !userService.isAdmin(loginUser)){
                throw new BusinessException(ErrorCode.NO_AUTH_ERROR);
            }
            //校验空间是否一致
            if(spaceId==null){
                if(oldPicture.getSpaceId()!=null){
                    spaceId = oldPicture.getSpaceId();
                }
            }else {
                //传了spaceId必须和原空间一致
                if(ObjUtil.notEqual(oldPicture.getSpaceId(), spaceId)){
                    throw new BusinessException(ErrorCode.PARAMS_ERROR,"空间 id 不一致");
                }
            }
        }
        //上传图片 得到图片信息  根据用户id划分目录
        String uploadPrefix;
        if(spaceId==null){
            //公共图库
            uploadPrefix = String.format("public/%s",loginUser.getId());
        }else {
            //空间
            uploadPrefix = String.format("space/%s",spaceId);
        }
        //根据 inputSource的类型 区分上传方式
        PictureUploadTemplate pictureUploadTemplate = filePictureUpload;
        if(inputSource instanceof String){
            pictureUploadTemplate = urlPictureUpload;
        }
        UploadPictureResult uploadPictureResult = pictureUploadTemplate.uploadPicture(inputSource, uploadPrefix);

        //构造要入库的信息
        Picture picture = new Picture();
        picture.setSpaceId(spaceId); //空间id
        picture.setUrl(uploadPictureResult.getUrl());
        picture.setThumbnailUrl(uploadPictureResult.getThumbnailUrl());
        //支持外层上传图片名称
        String picName = uploadPictureResult.getPicName();
        if(pictureUploadRequest != null && StrUtil.isNotBlank(pictureUploadRequest.getPicName())){
            picName = pictureUploadRequest.getPicName();
        }
        picture.setName(picName);
        picture.setPicSize(uploadPictureResult.getPicSize());
        picture.setPicWidth(uploadPictureResult.getPicWidth());
        picture.setPicHeight(uploadPictureResult.getPicHeight());
        picture.setPicScale(uploadPictureResult.getPicScale());
        picture.setPicFormat(uploadPictureResult.getPicFormat());
        // 转换为标准颜色
        //picture.setPicColor(ColorTransformUtils.getStandardColor(uploadPictureResult.getPicColor()));
        picture.setUserId(loginUser.getId());
        //补充参数
        this.fillReviewParams(picture, loginUser);
        //操作数据库 如果pictureId不为空 是更新，否则是新增
        if(pictureId!=null){
            picture.setEditTime(new Date());
            picture.setId(pictureId);
        }
        // 开启事务
        Long finalSpaceId = spaceId;
        transactionTemplate.execute(status -> {
            boolean result = this.saveOrUpdate(picture);
            ThrowUtils.throwIf(!result, ErrorCode.OPERATION_ERROR, "图片上传失败");
            if (finalSpaceId != null) {
                boolean update = spaceService.lambdaUpdate()
                        .eq(Space::getId, finalSpaceId)
                        .setSql("totalSize = totalSize + " + picture.getPicSize())
                        .setSql("totalCount = totalCount + 1")
                        .update();
                ThrowUtils.throwIf(!update, ErrorCode.OPERATION_ERROR, "额度更新失败");
            }
            return picture;
        });
        return PictureVO.objToVO(picture);
    }

    /**
     * 获取单个图像的VO对象
     * @param picture
     * @param request
     * @return
     */
    @Override
    public PictureVO getPictureVO(Picture picture, HttpServletRequest request){

        PictureVO pictureVO = PictureVO.objToVO(picture);
        Long userId = picture.getUserId();
        if(userId!=null && userId>0){
            User user = userService.getById(userId);
            UserVO userVO = userService.getUserVO(user);
            pictureVO.setUserVO(userVO);
        }
        return pictureVO;
    }

    /**
     * 分页获取图片 VO 对象
     * @param picturePage  page 对象
     * @param request request 请求
     * @return 分页的 VO
     */

    //todo
    @Override
    public Page<PictureVO> getPictureVOPage(Page<Picture> picturePage, HttpServletRequest request) {
        List<Picture> pictureList = picturePage.getRecords();
        Page<PictureVO> pictureVOPage = new Page<>(picturePage.getCurrent(), picturePage.getSize(), picturePage.getTotal());
        if(CollUtil.isEmpty(pictureList)){
            return pictureVOPage;
        }

        //对象列表 => 对象封装列表
        List<PictureVO> pictureVOList = pictureList.stream()
                .map(picture -> PictureVO.objToVO(picture))
                .collect(Collectors.toList());

        Set<Long> UserIdSet = pictureList.stream().map(Picture::getUserId).collect(Collectors.toSet());

        Map<Long, List<User>> userIdUserListMap = userService.listByIds(UserIdSet).stream().collect(Collectors.groupingBy(User::getId));
        //填充信息
        pictureVOList.forEach(pictureVO -> {
            Long userId = pictureVO.getUserId();
            User user = null;
            if(userIdUserListMap.containsKey(userId)){
                user = userIdUserListMap.get(userId).get(0);
            }
            pictureVO.setUserVO(userService.getUserVO(user));
        });
        pictureVOPage.setRecords(pictureVOList);

        return pictureVOPage;
    }

    /**
     * 校验参数
     * @param picture 需要校验的 picture 对象
     */
    @Override
    public void validPicture(Picture picture) {
        ThrowUtils.throwIf(picture==null, ErrorCode.PARAMS_ERROR);
        Long id = picture.getId();
        String url = picture.getUrl();
        ThrowUtils.throwIf(ObjUtil.isNull(id) || id<0,ErrorCode.PARAMS_ERROR,"id不能为空");
        if(StrUtil.isNotBlank(url)){
            ThrowUtils.throwIf(url.length() > 1024,ErrorCode.PARAMS_ERROR,"url过长");
        }
    }



    @Override
    public QueryWrapper<Picture> getQueryWrapper(PictureQueryRequest pictureQueryRequest) {
        QueryWrapper<Picture> queryWrapper = new QueryWrapper<>();
        if (pictureQueryRequest == null) {
            return queryWrapper;
        }
        // 从对象中取值
        Long id = pictureQueryRequest.getId();
        String name = pictureQueryRequest.getName();
        String introduction = pictureQueryRequest.getIntroduction();
        String category = pictureQueryRequest.getCategory();
        List<String> tags = pictureQueryRequest.getTags();
        Long picSize = pictureQueryRequest.getPicSize();
        Integer picWidth = pictureQueryRequest.getPicWidth();
        Integer picHeight = pictureQueryRequest.getPicHeight();
        Double picScale = pictureQueryRequest.getPicScale();
        String picFormat = pictureQueryRequest.getPicFormat();
        String searchText = pictureQueryRequest.getSearchText();
        Long userId = pictureQueryRequest.getUserId();
        Integer reviewStatus = pictureQueryRequest.getReviewStatus();
        String reviewMessage = pictureQueryRequest.getReviewMessage();
        Long reviewerId = pictureQueryRequest.getReviewerId();
        Long spaceId = pictureQueryRequest.getSpaceId();
        boolean nullSpaceId = pictureQueryRequest.isNullSpaceId();
        Date startEditTime = pictureQueryRequest.getStartEditTime();
        Date endEditTime = pictureQueryRequest.getEndEditTime();
        String sortField = pictureQueryRequest.getSortField();
        String sortOrder = pictureQueryRequest.getSortOrder();



        // 从多字段中搜索
        if (StrUtil.isNotBlank(searchText)) {
            // 需要拼接查询条件
            queryWrapper.and(qw -> qw.like("name", searchText)
                    .or()
                    .like("introduction", searchText)
            );
        }
        queryWrapper.eq(ObjUtil.isNotEmpty(id), "id", id);
        queryWrapper.eq(ObjUtil.isNotEmpty(userId), "userId", userId);
        queryWrapper.eq(ObjUtil.isNotEmpty(spaceId), "spaceId", spaceId);
        queryWrapper.isNull(nullSpaceId, "spaceId");
        queryWrapper.like(StrUtil.isNotBlank(name), "name", name);
        queryWrapper.like(StrUtil.isNotBlank(introduction), "introduction", introduction);
        queryWrapper.like(StrUtil.isNotBlank(picFormat), "picFormat", picFormat);
        queryWrapper.like(StrUtil.isNotBlank(reviewMessage), "reviewMessage", reviewMessage);
        queryWrapper.eq(StrUtil.isNotBlank(category), "category", category);
        queryWrapper.eq(ObjUtil.isNotEmpty(picWidth), "picWidth", picWidth);
        queryWrapper.eq(ObjUtil.isNotEmpty(picHeight), "picHeight", picHeight);
        queryWrapper.eq(ObjUtil.isNotEmpty(picSize), "picSize", picSize);
        queryWrapper.eq(ObjUtil.isNotEmpty(picScale), "picScale", picScale);
        queryWrapper.eq(ObjUtil.isNotEmpty(reviewStatus), "reviewStatus", reviewStatus);
        queryWrapper.eq(ObjUtil.isNotEmpty(reviewerId), "reviewerId", reviewerId);
        // >= start
        queryWrapper.ge(ObjUtil.isNotEmpty(startEditTime), "startEditTime", startEditTime);
        // < end
        queryWrapper.lt(ObjUtil.isNotEmpty(endEditTime), "endEditTime", endEditTime);
        // JSON 数组查询
        if (CollUtil.isNotEmpty(tags)) {
            for (String tag : tags) {
                queryWrapper.like("tags", "\"" + tag + "\"");
            }
        }
        // 排序
        queryWrapper.orderBy(StrUtil.isNotBlank(sortField), sortOrder.equals("ascend"), sortField);
        return queryWrapper;
    }

    /**
     * 对图片进行审核
     * @param pictureReviewRequest
     * @param loginUser
     */
    @Override
    public void doPictureReview(PictureReviewRequest pictureReviewRequest, User loginUser) {
        //校验参数
        ThrowUtils.throwIf(pictureReviewRequest==null, ErrorCode.PARAMS_ERROR);
        Long id = pictureReviewRequest.getId();
        Integer reviewStatus = pictureReviewRequest.getReviewStatus();
        String reviewMessage = pictureReviewRequest.getReviewMessage();
        PictureReviewStatusEnum reviewStatusEnum = PictureReviewStatusEnum.getEnumByValue(reviewStatus);
        if(id == null || reviewStatus == null || PictureReviewStatusEnum.REVIEWING.equals(reviewStatusEnum)){
            throw new BusinessException(ErrorCode.PARAMS_ERROR);
        }
        //判断图片是否存在
        Picture oldPicture = this.getById(id);
        ThrowUtils.throwIf(oldPicture==null, ErrorCode.NOT_FOUND_ERROR);
        //校验审核状态是否重复
        if(oldPicture.getReviewStatus().equals(reviewStatusEnum)){
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"请勿重复审核");
        }
        //对数据库经行操作
        Picture picture = new Picture();
        BeanUtils.copyProperties(pictureReviewRequest, picture);
        picture.setReviewerId(loginUser.getId());
        picture.setReviewTime(new Date());
        this.updateById(picture);
    }


    @Override
    public void fillReviewParams(Picture picture, User loginUser){
        if(userService.isAdmin(loginUser)){
            //是管理员
            picture.setReviewStatus(PictureReviewStatusEnum.PASS.getValue());
            picture.setUserId(loginUser.getId());
            picture.setReviewTime(new Date());
            picture.setReviewMessage(": 管理员审核自动通过");

        }else {
            //
            picture.setReviewStatus(PictureReviewStatusEnum.REVIEWING.getValue());
        }

    }

    /**
     * 批量抓取和创建图片
     * @param pictureUploadByBatchRequest
     * @param loginUser
     * @return
     */
    @Override
    public Integer uploadPictureByBatch(PictureUploadByBatchRequest pictureUploadByBatchRequest, User loginUser) {

        //1.校验参数
        String searchText = pictureUploadByBatchRequest.getSearchText();
        Integer count = pictureUploadByBatchRequest.getCount();
        ThrowUtils.throwIf(count >=30, ErrorCode.PARAMS_ERROR,"一次最大抓取30张图片");
        //名称前缀默认等于关键词
        String namePrefix = pictureUploadByBatchRequest.getNamePrefix();
        if(StrUtil.isBlank(namePrefix)){
            namePrefix = searchText;
        }
        //2.抓取内容
        String fetchUrl = String.format("https://cn.bing.com/images/async?q=%s&mmasync=1", searchText);
        Document document;
        try {
             document = Jsoup.connect(fetchUrl).get();
        } catch (IOException e) {
            log.error("获取页面失败:{}",e);
            throw new BusinessException(ErrorCode.OPERATION_ERROR,"获取页面失败");
        }
        //3.解析内容
        Element div = document.getElementsByClass("dgControl").first();
        if(ObjUtil.isEmpty(div)){
            throw new BusinessException(ErrorCode.OPERATION_ERROR,"获取元素失败");
        }
        Elements imagElementList = div.select("img.mimg");
        int uploadCount = 0;
        for (Element imgElement : imagElementList) {
            String fileUrl = imgElement.attr("src");
            if(StrUtil.isBlank(fileUrl)){
                log.info("当前链接为空 已跳过{}",fileUrl);
                continue;
            }
            //处理图片地址 防止转义或者与对象存储冲突
            int questionMarkIndex = fileUrl.indexOf("?");
            if(questionMarkIndex >-1){
                fileUrl = fileUrl.substring(0, questionMarkIndex);
            }
            //4.上传图片
            PictureUploadRequest pictureUploadRequest = new PictureUploadRequest();
            pictureUploadRequest.setFileUrl(fileUrl);
            pictureUploadRequest.setPicName(namePrefix + (uploadCount+1));
            try {
                PictureVO pictureVO = this.uploadPicture(fileUrl, pictureUploadRequest, loginUser);
                log.info("图片上传成功，id={}",pictureVO.getId());
                uploadCount++;
            }catch (Exception e){
                log.error("图片上传失败",e);
                continue;
            }
            if(uploadCount >= count){
                break;
            }
        }
        return uploadCount;
    }

    /**
     *  清理图片文件
     * @param oldPicture
     */
    @Async
    @Override
    public void clearPictureFile(Picture oldPicture) {
        //判断该图片是否被多条记录使用
        String pictureUrl = oldPicture.getUrl();
        Long count = this.lambdaQuery()
                .eq(Picture::getUrl, pictureUrl)
                .count();
        //有不止一条记录用到该图片，不清理
        if(count > 1){
            return;
        }
        //删除图片
        cosManager.deleteObject(pictureUrl);
        //删除缩略图
        String thumbnailUrl = oldPicture.getThumbnailUrl();
        if (StrUtil.isNotBlank(thumbnailUrl)) {
            cosManager.deleteObject(thumbnailUrl);
        }
    }

     /**
     * 删除图片
     * @param pictureId
     * @param loginUser
     */
    @Override
    public void deletePicture(long pictureId, User loginUser) {
        ThrowUtils.throwIf(pictureId <= 0, ErrorCode.PARAMS_ERROR);
        ThrowUtils.throwIf(loginUser == null, ErrorCode.NO_AUTH_ERROR);
        // 判断是否存在
        Picture oldPicture = this.getById(pictureId);
        ThrowUtils.throwIf(oldPicture == null, ErrorCode.NOT_FOUND_ERROR);
        // 校验权限 已经改为使用注解鉴权
        //checkPictureAuth(loginUser, oldPicture);
        // 开启事务
        transactionTemplate.execute(status -> {
            // 操作数据库
            boolean result = this.removeById(pictureId);
            ThrowUtils.throwIf(!result, ErrorCode.OPERATION_ERROR);
            // 释放额度
            Long spaceId = oldPicture.getSpaceId();
            if (spaceId != null) {
                boolean update = spaceService.lambdaUpdate()
                        .eq(Space::getId, spaceId)
                        .setSql("totalSize = totalSize - " + oldPicture.getPicSize())
                        .setSql("totalCount = totalCount - 1")
                        .update();
                ThrowUtils.throwIf(!update, ErrorCode.OPERATION_ERROR, "额度更新失败");
            }
            return true;
        });
        // 异步清理文件
        this.clearPictureFile(oldPicture);

    }


    @Override
    public void editPicture(PictureEditRequest pictureEditRequest, User loginUser) {
        // 在此处将实体类和 DTO 进行转换
        Picture picture = new Picture();
        BeanUtils.copyProperties(pictureEditRequest, picture);
        // 注意将 list 转为 string
        picture.setTags(JSONUtil.toJsonStr(pictureEditRequest.getTags()));
        // 设置编辑时间
        picture.setEditTime(new Date());
        // 数据校验
        this.validPicture(picture);
        // 判断是否存在
        long id = pictureEditRequest.getId();
        Picture oldPicture = this.getById(id);
        ThrowUtils.throwIf(oldPicture == null, ErrorCode.NOT_FOUND_ERROR);
        // 校验权限 已经改为使用注解鉴权
        //checkPictureAuth(loginUser, oldPicture);
        // 补充审核参数
        this.fillReviewParams(picture, loginUser);
        // 操作数据库
        boolean result = this.updateById(picture);
        ThrowUtils.throwIf(!result, ErrorCode.OPERATION_ERROR);
    }



    /**
     * 校验空间图片的权限
     * @param loginUser
     * @param picture
     */
    @Override
    public void checkPictureAuth(User loginUser, Picture picture) {
        Long loginUserId = loginUser.getId();
        Long spaceId = picture.getSpaceId();
        if(spaceId == null){
            //公共图片 仅本人或管理员可以操作
            if(!loginUserId.equals(picture.getUserId()) && !userService.isAdmin(loginUser)){
                throw new BusinessException(ErrorCode.NO_AUTH_ERROR);
            }
        }else {
            // 私人空间 仅本人可以操作
            if(!loginUserId.equals(picture.getUserId())){
                throw new BusinessException(ErrorCode.NO_AUTH_ERROR);
            }
        }
    }


    /**
     * 以颜色搜图
     * @param spaceId
     * @param picColor
     * @param loginUser
     * @return
     */
    @Override
    public List<PictureVO> searchPictureByColor(Long spaceId, String picColor, User loginUser) {
        // 1. 校验参数
        ThrowUtils.throwIf(spaceId == null || StrUtil.isBlank(picColor), ErrorCode.PARAMS_ERROR);
        ThrowUtils.throwIf(loginUser == null, ErrorCode.NO_AUTH_ERROR);
        // 2. 校验空间权限
        Space space = spaceService.getById(spaceId);
        ThrowUtils.throwIf(space == null, ErrorCode.NOT_FOUND_ERROR, "空间不存在");
        if (!loginUser.getId().equals(space.getUserId())) {
            throw new BusinessException(ErrorCode.NO_AUTH_ERROR, "没有空间访问权限");
        }
        // 3. 查询该空间下所有图片（必须有主色调）
        List<Picture> pictureList = this.lambdaQuery()
                .eq(Picture::getSpaceId, spaceId)
                .isNotNull(Picture::getPicColor)
                .list();
        // 如果没有图片，直接返回空列表
        if (CollUtil.isEmpty(pictureList)) {
            return Collections.emptyList();
        }
        // 将目标颜色转为 Color 对象
        Color targetColor = Color.decode(picColor);
        // 4. 计算相似度并排序
        List<Picture> sortedPictures = pictureList.stream()
                .sorted(Comparator.comparingDouble(picture -> {
                    // 提取图片主色调
                    String hexColor = picture.getPicColor();
                    // 没有主色调的图片放到最后
                    if (StrUtil.isBlank(hexColor)) {
                        return Double.MAX_VALUE;
                    }
                    Color pictureColor = Color.decode(hexColor);
                    // 越大越相似
                    return -ColorSimilarUtils.calculateSimilarity(targetColor, pictureColor);
                }))
                // 取前 12 个
                .limit(12)
                .collect(Collectors.toList());

        // 转换为 PictureVO
        return sortedPictures.stream()
                .map(PictureVO::objToVO)
                .collect(Collectors.toList());
    }

    /**
     * 批量编辑图片
     * @param pictureEditByBatchRequest
     * @param loginUser
     */
    @Override
    public void editPictureByBatch(PictureEditByBatchRequest pictureEditByBatchRequest, User loginUser) {
        //1. 获取和校验参数
        List<Long> pictureIdList = pictureEditByBatchRequest.getPictureIdList();
        Long spaceId = pictureEditByBatchRequest.getSpaceId();
        String category = pictureEditByBatchRequest.getCategory();
        List<String> tags = pictureEditByBatchRequest.getTags();
        ThrowUtils.throwIf(CollUtil.isEmpty(pictureIdList), ErrorCode.PARAMS_ERROR);
        ThrowUtils.throwIf(spaceId==null,ErrorCode.PARAMS_ERROR);
        ThrowUtils.throwIf(loginUser == null, ErrorCode.NO_AUTH_ERROR);
        //2.校验空间权限
        Space space = spaceService.getById(spaceId);
        ThrowUtils.throwIf(space == null, ErrorCode.NOT_FOUND_ERROR,"空间不存在");
        if (!loginUser.getId().equals(space.getUserId())) {
            throw new BusinessException(ErrorCode.NO_AUTH_ERROR,"没有空间访问权限");
        }
        //3.查询指定图片  仅选择需要的字段
        List<Picture> pictureList = this.lambdaQuery()
                .select(Picture::getId, Picture::getSpaceId)
                .eq(Picture::getSpaceId, spaceId)
                .in(Picture::getId, pictureIdList)
                .list();
        //4.更新分类和标签
        pictureList.forEach(picture -> {
            if(StrUtil.isNotBlank(category)){
                picture.setCategory(category);
            }
            if(CollUtil.isNotEmpty(tags)){
                picture.setTags(JSONUtil.toJsonStr(tags));
            }
        });
        // 批量重命名
        String nameRule = pictureEditByBatchRequest.getNameRule();
        fillPictureWithNameRule(pictureList, nameRule);

        //5.操作数据库进行批量更新
        boolean result = this.updateBatchById(pictureList);
        ThrowUtils.throwIf(!result, ErrorCode.OPERATION_ERROR,"批量编辑失败");
    }

    @Override
    public CreateOutPaintingTaskResponse createPictureOutPaintingTask(CreatePictureOutPaintingTaskRequest createPictureOutPaintingTaskRequest, User loginUser) {
        //获取图片信息
        Long pictureId = createPictureOutPaintingTaskRequest.getPictureId();
        Picture picture = this.getById(pictureId);
        ThrowUtils.throwIf(picture == null, ErrorCode.NOT_FOUND_ERROR,"图片不存在");
        //权限校验 已经改为使用注解鉴权
        //checkPictureAuth(loginUser, picture);
        //创建扩图任务
        CreateOutPaintingTaskRequest createOutPaintingTaskRequest = new CreateOutPaintingTaskRequest();
        CreateOutPaintingTaskRequest.Input input = new CreateOutPaintingTaskRequest.Input();
        input.setImageUrl(picture.getUrl());
        createOutPaintingTaskRequest.setInput(input);
        createOutPaintingTaskRequest.setParameters(createPictureOutPaintingTaskRequest.getParameters());
        //调用任务
        return aliYunAiApi.createOutPaintingTask(createOutPaintingTaskRequest);
    }


    /**
     * nameRule 格式：图片{序号}
     *
     * @param pictureList
     * @param nameRule
     */
    private void fillPictureWithNameRule(List<Picture> pictureList, String nameRule) {
        if (CollUtil.isEmpty(pictureList) || StrUtil.isBlank(nameRule)) {
            return;
        }
        long count = 1;
        try {
            for (Picture picture : pictureList) {
                String pictureName = nameRule.replaceAll("\\{序号}", String.valueOf(count++));
                picture.setName(pictureName);
            }
        } catch (Exception e) {
            log.error("名称解析错误", e);
            throw new BusinessException(ErrorCode.OPERATION_ERROR, "名称解析错误");
        }
    }
}